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Uploaded on: June 6, 2025
Though ADHD and UC are distinct conditions, their symptoms can often overlap. This can make it challenging to receive a diagnosis for either condition.
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Some research suggests that people with ADHD are more likely to get digestive problems, possibly caused by an altered gut-brain axis.[1]The most common symptom is constipation, which is linked to poor eating habits and dehydration. Irritable bowel syndrome (IBS) is also more common.
Some ADHD meds may also cause side effects that mimic the symptoms of UC. For example, decreased appetite, anxiety, constipation, and weight loss are all possible side effects of a widely-prescribed treatment for ADHD.
And during UC flare-ups, the symptoms can worsen and may cause cognitive impairment, thought to be due to an impaired gut-brain axis.[2]
Does having ulcerative colitis make it harder to be diagnosed with ADHD?
It depends. UC, especially during flare-ups, can mimic ADHD symptoms like brain fog and difficulty concentrating. As a result, your doctor might overlook ADHD symptoms.
Some people with UC often maintain a healthier diet and follow a structured routine. While these practices help manage UC, they may also unintentionally help manage ADHD.
On the other hand, an ADHD diagnosis might complicate a UC diagnosis. People with ADHD who are on medication might experience symptoms that are similar to those of UC, like constipation. This might make it harder to notice or diagnose UC.
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References:
Cickovski, T., et al. (2023). Attention Deficit Hyperactivity Disorder (ADHD) and the gut microbiome: An ecological perspective. PLOS ONE, 18(8), e0273890.
Fan, W. et al. (2019). Aberrant Brain Function in Active-Stage Ulcerative Colitis Patients: A Resting-State Functional MRI Study. Frontiers in Human Neuroscience, 13, 107.
Reading time: 2 min
Uploaded on: June 6, 2025
